Thanks any help is greatly appreciated. I'm honestly unsure even after reading some reviews etc which two are best to use for my builds (9850 be, Raptor Drives, Good Video Card 8800GT or better for sure and 1066 OCZ SLI RAM)

Hopefully you're not into overclocking because the Biostar AFAIK sucks, but it is AM3 capable.

Well the 7xxA never really offered anything better for the AM2 cpu it is AM3 capable with bios update I would imagine, finding information about this board is hard. As for overclocking, couldn't find a decent review.

In all honestly I'd keep the 750a at least you'll have the option to SLI if you get another 8800GT. As for the biostar that would be the one I try to get rid of, the M2N32 SLI is solid board keep it around for a folding box or something.

Well I'd kinda say keep the MSI and Biostar (even though they aren't my favourite brands by any means) just that they are the newest boards chipset wise. However at the same time that ASUS, even though its the old nForce 590, is a very feature rich board.

I'd say keep the Biostar and build a cheap office PC with it since it has onboard video or make a HTPC. If not for you, sell it to somebody you know or something.

Then decide wether you want the ASUS or MSI board to make a gaming rig out of.

Regardless I think you're going to have a hard time selling any of these boards since AMD isn't overly popular and those going Phenom II would most likely rather a higher-end 790GX/FX board that's made for overclocking. IMO I'd just keep them all and when a friend/family member needs a new PC, build them one and sell it that way.